All assays for molecular, serological, morphological identification, or characterization of parasitic diseases—and Trichomonas susceptibility testing—at CDC are temporarily offline and turn-around time is delayed. Diagnostic testing through CDC is expected to resume soon. CDC offers consultation regarding other options in the absence of diagnostic testing at CDC for some parasitic diseases.
Various laboratory methods can be used to diagnose leishmaniasis—to detect the parasite as well as to identify the Leishmania species (type). Some of the methods are available only in reference laboratories. In the United States, CDC staff can assist with the testing for leishmaniasis.
Tissue specimens—such as from skin sores (for cutaneous leishmaniasis) or from bone marrow (for visceral leishmaniasis)—can be examined for the parasite under a microscope, in special cultures, and by molecular tests. Blood tests that detect antibody (an immune response) to the parasite can be helpful for cases of visceral leishmaniasis; tests to look for the parasite (or its DNA) itself usually also are done.